Key points

Smallpox B (Mpox)

• Six cases (including two imported cases) were identified in Réunion between S05 and S08/2026.

Leptospirosis

• A seasonal resurgence of leptospirosis is currently underway at a high level: 39 cases have occurred since the beginning of the year.

Chikungunya and dengue

• Sporadic local cases of arboviral diseases have been reported since the beginning of the year. To date, 12 local cases of dengue and 12 local cases of chikungunya have been detected.

Malaria

• Since December, there has been an increase in the number of imported malaria cases, primarily among travelers returning from the Comoros. Nine cases were reported in December and 18 in January. A decline began in February (5 cases to date). We urge all stakeholders to remain vigilant and remind them that, until proven otherwise, any fever upon return from an endemic area should be considered a case of malaria.

Flu-like syndrome

• Health indicators are at a low level.

Bronchiolitis in children under 2

• Health and virological indicators are at baseline levels. No health impact.

COVID-19

• Health and virological indicators are rising but with limited health impact.

Gastroenteritis

• Activity is stable in hospitals and in community practice.